利用奈米壓印技術於液晶配向特性之研究

Abstract

探討液晶分子在奈米壓印微結構表面的配向特性。將不同週期及深度的奈米壓印薄膜製作在玻璃基板上，做為液晶的配向膜。液晶分子的配向能力是取決於微結構的週期及深度，即使奈米壓印薄膜本身材質對液晶沒有並沒有配向能力。我們藉由量測樣品的光電特性、錨定能及預傾角，來觀察液晶在奈米壓印薄膜的配向特性，樣品是由上下兩層奈米壓印膜作為配向膜的液晶盒。這樣的奈米壓印配向薄膜可以被應用在顯示器上。我們同時也利用奈米壓印膜實現電控可調式的液晶光柵。

Surface alignment capability of liquid crystals using nanoimprint lithography technology (NIL) is studied. Nanostructures with different periodicities were fabricated on glass substrates as alignment layers of liquid crystals. The alignment capability depends on the periods and depths of nanostructures even though the materials of nanostructures can not align LCs. We measured the electro-optical properties, the anchoring energy, and the pretilt angle of liquid crystals after filling LCs into a LC cell consisting of two nanoimprint layers. Such nanoimprint alignment layers can be used for display applications. We also demonstrated an electrically tunable liquid crystal grating by using single or double nanoimpring layers.